7.2 Nervous system

Description

Year 9 Sciences Flashcards on 7.2 Nervous system, created by Addna Dahir on 17/02/2018.
Addna Dahir
Flashcards by Addna Dahir, updated more than 1 year ago
Addna Dahir
Created by Addna Dahir almost 7 years ago
6
0
1 2 3 4 5 (0)

Resource summary

Question Answer
What is the nervous system? The nervous system is a communication network that controls other systems of your body, such as digestive and circulatory system.
What are the main parts of the nervous system? The central nervous system (CNS) and the peripheral nervous system (PNS).
What is another name for nerve cells? Neurons
What does the Cns do? The Cns recieves information from all over the body, processes that information and then sends out messages telling the body how to respond.
What are nerve impulses? A signal transmitted along a nerve fibre. It consists of a wave of electrical depolarization that reverses the potential difference across the nerve cell membranes.
What are the 3 common types of neuron? 1.Motor neuron 2.Sensory neuron 3.Connector neuron
What is a neurotransmitter? A chemical substance which is released at the end of a nerve fibre by the arrival of a nerve impulse and, by diffusing across the synapse or junction, effects the transfer of the impulse to another nerve fibre, a muscle fibre, or some other structure.
What is the cerebrum? The cerebrum is the main part of the brain in humans and other vertebrates. Functionally, it obtains information from your surroundings and/or body and then sends that information to a specific part of the cerebrum.
Where is the cerebellum located? The cerebellum is located where your skull curves inwards.
How many neurons does the brain contain? The human brain contains about 100 billion neurons. Its average volume is 1200-1400ml
What is FMRI? Functional magnetic resonance imaging.
What is MRI? Magnetic resonance imaging.
Describe the function of dendrites The dendrites branch out from the cell body and receive messages from other nerve cells, which are then sent on to the nerve body.
What are neurons covered in? Neurons are covered with an insulating layer of myelin sheath
What is a synapse? A junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
What is a reflex action? Reflex actions are quick, automatic reactions that protect the body from danger ; also known as reflexes.
What is a vertebrae? A vertebrae is bones that surround the spinal cord and provide attachment for muscles.
What is a reflex arc? A reflex arc is the nerve pathway operating in a reflex action.
What are the parts that the cerebrum is made up of? The cerebrum is made up of 2 parts called the right and left cerebral hemispheres.
What is PET? Positive emission topography
Show full summary Hide full summary

0 comments

There are no comments, be the first and leave one below:

Similar

CHEMISTRY C1 1
x_clairey_x
CHEMISTRY C1 2
x_clairey_x
CHEMISTRY C1 5
x_clairey_x
BIOLOGY B1 1
x_clairey_x
CHEMISTRY C1 4
x_clairey_x
CHEMISTRY C1 6
x_clairey_x
BIOLOGY B1 3
x_clairey_x
BIOLOGY B1 2
x_clairey_x
CHEMISTRY C1 3
x_clairey_x
CHEMISTRY C1 7
x_clairey_x